Simply Sparkles Dog Birthday Hats are designed to be a perfect addition to your pet's most special day! With many great colors and options, these dog birthday hats are a sure way to make your little ones simply sparkle, in their own unique way! -Lime Green and Pink Sparkles Pom-Poms -Sparkly Pink Hat Base -Pink or Green elastic chin strap Hats come in sizes S & size M . Size small fits dogs up to 15 pounds. Size M fits dogs 16 pounds or more.